وَإِذَا قَرَأْتَ الْقُرْآنَ جَعَلْنَا بَيْنَكَ وَبَيْنَ الَّذِينَ لَا يُؤْمِنُونَ بِالْآخِرَةِ حِجَابًا مَّسْتُورًا 
A Brief Tour through the Qur'an The first revealed chapter of the Qur’an, Al-‘Alaq (literally, the clot), speaks in particular of the creation of humankind and its origin, a coagulated drop of blood.